The word coordinate has two vowels in it, that would ordinarily make the /u/ sound. Probably because of the word's etymology (Latin co- (“together”) + ordinare (“arrange”)) it is not pronounced as such but as two separate sounds.
Usually, the word for a pair of vowels would be a diphthong or a digraph, however, those words are reserved specifically for two vowels which make one syllable.
Two vowel sounds joined in one syllable to form one speech sound
Is there a specific linguistic term for a pair of vowels that, when pronounced, for two speech sounds?
Best Answer
Adjacent vowels that are pronounced as separate syllables are said to be in hiatus:
However, I don't know of any specific terms for the vowels themselves, or for the sequence of vowel letters.